This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A278774 #4 Nov 28 2016 08:18:46 %S A278774 1,117,1972,19750,150085,955347,5355983,27218249,127644118,559023840, %T A278774 2305566900,9009824325,33520023813,119176965881,406212717567, %U A278774 1330964850429,4202125841615,12811256626245,37790376053439 %N A278774 Number of nX4 0..1 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes. %C A278774 Column 4 of A278778. %H A278774 R. H. Hardin, <a href="/A278774/b278774.txt">Table of n, a(n) for n = 1..210</a> %H A278774 R. H. Hardin, <a href="/A278774/a278774.txt">Empirical polynomial of degree 36</a> %F A278774 Empirical polynomial of degree 36 (see link above) %e A278774 Some solutions for n=4 %e A278774 ..1..1..0..0. .0..1..1..0. .0..0..1..0. .0..0..1..0. .1..0..0..0 %e A278774 ..1..1..0..0. .1..1..0..1. .1..1..1..0. .0..1..0..1. .1..0..1..1 %e A278774 ..0..1..1..1. .0..0..1..0. .1..0..0..1. .1..0..1..1. .1..1..1..1 %e A278774 ..1..0..0..0. .0..1..1..1. .1..1..1..0. .1..1..0..0. .1..0..0..0 %Y A278774 Cf. A278778. %K A278774 nonn %O A278774 1,2 %A A278774 _R. H. Hardin_, Nov 28 2016